Window frame



FIG. 1 is a perspective view.

FIG. 2 is a right side view.

FIG. 3 is a left side view.

FIG. 4 is a bottom view.

FIG. 5 is a top view.

FIG. 6 is a front view; and,

FIG. 7 is a rear view.

The broken lines are included for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a window frame thereof, as shown and described. 